Locomotive front end construction



1 May 5, 1931. J. 5. COFFIN, JR

LOCOHOTIVE FRONT END CONSTRUCTION 2 Sheets-Sheet 1 W jNVENTOR 0 o 0 0 0 0 0 0 o o 0 0 0 0 0 o owowowo 0 0 0 0 0 o o o owomomo o o o o omowowo y 1931- J. s. COFFIN, JR

LOCOXOTIVE FRONT END CONSTRUCTION Filed July 30, 1927 2 Sheets-Sheet 2 i I .ER

ATTORNEYS my NTOR';

Patented May 5, 1931 I UNITED STATES PATENT. OFFICE JOEL S. COFFIN', m, ENG-LEWOOD, NEW J'ERSEY, A SSIGNOR TO C-S ENGINEERING COMPANY, OF JERSEY CITY, NEW JERSEY, A CORPORATION OF DELAWARE LocoMo'rI vE mm END CONSTRUCTION" I Application filed July 30, 1927. Serial No. 209,504.

This invention relates to locomotive front end Construction, and more particularly to front end feed water heaters.

Among the more important objects of the invention are the provision of a feed water heater which'is simple and rugged in con struction, easy to clean and repair and effi- 4 cient in operation.

Specifically, I contemplate a construction in which the heater casing and its steam connections are recessed or built into the forward portion of the smoke-box. I also provide an assembly of the heater elements proper which may be inserted into the builtin casing as a unit.

How the foregoing objects and advantages, together with others which may appear hereinafter, are obtained will be clear from the following description consideredin connection with the accompanying drawings which illustrate a preferred embodiment of the invention, and in which Fig. 1 is a front view of a locomotive boiler with the heater of the present invention applied thereto, the figure being partly, in elevation and partly in section through the heater, show portions of those behind.

Fig. 2 is a fragmentary view, on an enlarged scale, of the forward portion ofthe smoke-box and heater, taken as indicated by the line 22 of Fig. 1, and

Figs. 3, 4 and 5 are fragmentary sectional views, on an enlarged scale, showing certain details of the construction,'the figures being taken as indicated by the lines 3-3, 44 and 5-5, respectively, of Fig. 1.

The heater itself is of the same general type as that disclosed in application of E. Land C. A. Schellens, Serial Number 94,370, filed March 13, 1926, and assigned to the assignee of the present invention.

Referring now to the drawings, the reference numeral 6 indicates the steel shell of the smoke-box which is preferably cast with the arcuate heater casing 7 integral therewith. The steam supply passages 8, provided with inlets 9, extend upwardly around the inside of the shell 6 and are also 'pref erably integrally cast with the shell. Thus with certain parts brokenaway to the casing and steam passages are peripherally disposed within the smoke box. The passages 8 join at the top of the shell and an opening 10 is provided at that-point through which the steam passes to the heater through the perforated distributing plate 11.

' A passage 12 connects the condensate cham bers 31 and is disposed peripherally in the bottom of the smoke box. -The condensate may be drained tothe track or delivered to some suitable point-of use, such as the tender tank, through either of the openings 30. The

passage ;12 is also shown as being cast with the smoke-box. A clean-out plug 12a is provided at the bottom of the arcuate passage The heater casing cover 13 is adapted to be bolted onto the flanges 14 and 15 formed on the shell 6 and the casing 7, respectively. This cover 13 carries the tube sheets 16 and 17,

preferablyby welding indicated at 18. The

tubes 19 extend from sheet to sheet in arcuate formation as clearly indicated in Fig. 1. The sheets 16 and 17 are provided with a. number of baflies 20 which are complementary in dividing the tubes into a number'of passes.

The sheet 17 has a plate 21 secured thereto which, together with the sheet 17 and its baffles 20, forms a multiple header, the forward'chamber of which communicates with the water inlet 22. (See Fig. ,3.)

' The sheet '16 has a doubled walled member 23 secured thereto. The upper wall 23a of this member cooperates with the sheet 16 and its baflies 20 to form a multiple header whose chambers are complementary to; or counterparts of, the chambers formed in the header at the other end of the heater. (See Fig. 4.)

An opening 24 is provided between the last or rearward chamber of this header and thespace between the walls of the member 23. The feed water discharge opening 25 also communicates with this space, through the opening 26 in the wall 23a.

It is to benoted that the distributing plate H 11 is secured to, the .sheets 16 and '17 and that the plates 27,1 which are provided at a number of points aroundthe arcuate heater for spacing the tubes, also aid in supporting the plate 11. p

Cir'cumferentially extending flanges 28 and 29 cooperate with the outer and inner edges, respectively, of the plate 11 to prevent any steam from entering the heater except 5 through the perforations of the plate 11. These flanges are also preferably cast integral with the'smoke-box and heater casing.

According to the foregoing I provide a heater which is insertable in and removable from its casing as a unit. The advantages afforded by such an arrangement for cleaning and repairing purposes are obvious.

Furthermore, the heater casing, with its steam supply passages, being built-in or cast integral with the smoke-box, makes for simplicity and ruggedness of construction, insures an unobstructed View for the engineman, and, above all, results in maximum efiiciency.

I claim v 1. A cast steel smoke box having an arouate feed water heater receiving pocket formed integral therewith and extending within its cylindrical portion. 2. In combination with a locomotive and its smokebox. shell, a curved. Water tube feed water heater recessed in said smoke box shell.

3. A cast steel smoke box having an arouate feed water heater casing structure formed integral therewith at its front end and recessed within the cylindrical surface of the smoke box. a I 1. A locomotive front end construction comprising a smoke box having a feed water heater casing and steam passages therefor all formed therein on the inside of the cylindrical shell thereof.

' 5. A smoke box construction comprising a shell havingan internal peripherally-dis- 40 posedheater structure, and arcuate steam distributing means formed-with said shell and hfiwlilng an inlet opening at the outside of the .s e

' 6. A front end construction comprisir ig, in combination, a smoke box with substantially semi-circular heater therein, steam inlet means delivering adjacent the upper portion of the heater, and-condensate outlets at the legs ,ofthe heater.

Q 7. A front end construction comprising, in combination, a smoke box with substantially semi-circular heater therein, steam inlet -means delivering adjacent the upper portion of the heater, and condensate outlets at the.

legs of the heater, together with a cross-connection between said outlets.

8. A front end construction comprising, in combination, a smoke box with substantially semi-circular heater, therein, steam inlet means delivering adjacent the upper portion of the heater, and condensate outlets .at the legs of the heater, together with a cross-comv nection between said outlets peripherally disposed in the bottom of the front end. 9. A front end construction comprising, in

combination, a smoke box with substantially semi-circular hater therein, steam inlet means delivering adjacent the upper portion of the heater, and condensate outlets at the legs of the heater, together with a cross-connection between said outlets formed integral with the front end. 5

10. Apparatus of the character described, comprising a. smoke box having a heater formed therein, and an external front cover for the heater removablyv mounted on the smoke box separate from the smoke box front end cover, with water inlet and outlet means in said heater cover.

11. Apparatus of. the character described, comprising a smoke box having a heater formed therein, and an external front cover for the heater removably mounted on the smoke box separate from the smoke box front end cover, with tube plates supported by said cover. l

12. Apparatus of the character described, comprising a smoke box having a heater formed therein, and an external front cover for the heater separate from the smoke box front end cover, with tube plates welded inside said cover, and water header members mounted on said plates.

13. A substantially semi-circular arcuate heater in a smoke box, with integral arcuate 9" steam passage having an lnlet at the top to o the heater, and supply connections at each side gt the bottom extending outside the smoke 14. A smoke-box with built-in heater cas-. ing, a separable front cover therefor, tubes 1 in said casing, and tube spacing means'supported by said cover.

15. A smoke-box with built-in heater casing, a separable front cover therefor, tubes in said casing, and tube spacing means supported by said cover on its inner side.

16. A smoke-box with built-in heater casing, a separable front cover therefor, tubes in said casing, tube spacing means supported by said cover, steam admission means for the heater, and steam distributing means supported bysaid spacing means.

17:. A. smoke-box having a built-in semicircular heater casing and a single external semi-circularfront cover for said casing together with heater elements carried by said cover.

' 18. A smoke-box having a heater casing integral with said smoke-box and casing and cooperating with said distributing means to direct the steam over the water heating elements.

20. In combination, a substantially semicircular feed water heater having condensate chambers at each leg thereof and a passage interconnecting said condensate chambers.

. 21. A locomotive smoke box construction having a peripherally-disposed arcuate feed water heater recess formed therein within its normal outside circumference.

22. A locomotive smoke-box construction having a peripherally-disposed arcuate recess formed therein within its general outside circumference, and having an inner wall in large part substantially concentric with the outside circumferential surface of the smoke-box.

25. A locomotive smoke-box construction having a peripherally-disposed arcuate recess formed therein at the upper part thereof within its general outside circumference and having an inner wall in large part substantially concentric with the outside circumferential surface of the smoke-box.

24. A locomotive smoke-box construction having a peripherally-disposed pocket extending therein from its general outside circumferential surface and in large part arced.

substantially concentric with said surface, and outlet means from the lower part thereof.

25. A locomotive front end construction comprising, in combination, a curved shell' with a pocket therein at least in part arced substantially concentric withj said shell, inlet means delivering adjacent the upper portion of the pocket, and outlet means at a leg of said arcuate pocket.

26. In combination with a locomotive and its cylindrical boiler and smoke-box shell, a

: recess formed therein adjacent its circumferential surface and having a substantially inyerted U-shaped defining wall with one leg of the U at each side of the locomotive.

27. A cast steel smoke-box having a casing structure formed integral therewith adjacent'its front end and recessed withinthe' normal cylindrical surface thereof and at least in part curved substantially concentric with said surface. I

28. A cast steel smoke-box having a casing structure for an auxiliary formed integral therewith adjacent its front end and recessed within the normal cylindrical surface there of and at least in part curved substantially concentric with said surface.

In testimony whereof I have hereunto signed my name. i

JOEIFS. GOFFIN, JR.- 

